p4-fast-export.py

   1 #!/usr/bin/python
   2 #
   3 # p4-fast-export.py
   4 #
   5 # Author: Simon Hausmann <hausmann@kde.org>
   6 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
   7 #
   8 # TODO:
   9 #       - support integrations (at least p4i)
  10 #       - support p4 submit (hah!)
  11 #
  12 import os, string, sys, time
  13 import marshal, popen2, getopt
  14
  15 branch = "refs/heads/master"
  16 prefix = previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
  17 detectBranches = False
  18 if len(prefix) != 0:
  19     prefix = prefix[:-1]
  20
  21 try:
  22     opts, args = getopt.getopt(sys.argv[1:], "", [ "branch=", "detect-branches" ])
  23 except getopt.GetoptError:
  24     print "fixme, syntax error"
  25     sys.exit(1)
  26
  27 for o, a in opts:
  28     if o == "--branch":
  29         branch = "refs/heads/" + a
  30     elif o == "--detect-branches":
  31         detectBranches = True
  32
  33 if len(args) == 0 and len(prefix) != 0:
  34     print "[using previously specified depot path %s]" % prefix
  35 elif len(args) != 1:
  36     print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  37     print "\n    example:"
  38     print "    %s //depot/my/project/ -- to import the current head"
  39     print "    %s //depot/my/project/@all -- to import everything"
  40     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  41     print ""
  42     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  43     print ""
  44     sys.exit(1)
  45 else:
  46     if len(prefix) != 0 and prefix != args[0]:
  47         print "previous import used depot path %s and now %s was specified. this doesn't work!" % (prefix, args[0])
  48         sys.exit(1)
  49     prefix = args[0]
  50
  51 changeRange = ""
  52 revision = ""
  53 users = {}
  54 initialParent = ""
  55 lastChange = ""
  56 initialTag = ""
  57
  58 if prefix.find("@") != -1:
  59     atIdx = prefix.index("@")
  60     changeRange = prefix[atIdx:]
  61     if changeRange == "@all":
  62         changeRange = ""
  63     elif changeRange.find(",") == -1:
  64         revision = changeRange
  65         changeRange = ""
  66     prefix = prefix[0:atIdx]
  67 elif prefix.find("#") != -1:
  68     hashIdx = prefix.index("#")
  69     revision = prefix[hashIdx:]
  70     prefix = prefix[0:hashIdx]
  71 elif len(previousDepotPath) == 0:
  72     revision = "#head"
  73
  74 if prefix.endswith("..."):
  75     prefix = prefix[:-3]
  76
  77 if not prefix.endswith("/"):
  78     prefix += "/"
  79
  80 def p4CmdList(cmd):
  81     pipe = os.popen("p4 -G %s" % cmd, "rb")
  82     result = []
  83     try:
  84         while True:
  85             entry = marshal.load(pipe)
  86             result.append(entry)
  87     except EOFError:
  88         pass
  89     pipe.close()
  90     return result
  91
  92 def p4Cmd(cmd):
  93     list = p4CmdList(cmd)
  94     result = {}
  95     for entry in list:
  96         result.update(entry)
  97     return result;
  98
  99 def extractFilesFromCommit(commit):
 100     files = []
 101     fnum = 0
 102     while commit.has_key("depotFile%s" % fnum):
 103         path =  commit["depotFile%s" % fnum]
 104         if not path.startswith(prefix):
 105             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 106             continue
 107
 108         file = {}
 109         file["path"] = path
 110         file["rev"] = commit["rev%s" % fnum]
 111         file["action"] = commit["action%s" % fnum]
 112         file["type"] = commit["type%s" % fnum]
 113         files.append(file)
 114         fnum = fnum + 1
 115     return files
 116
 117 def branchesForCommit(files):
 118     branches = set()
 119
 120     for file in files:
 121         relativePath = file["path"][len(prefix):]
 122         # strip off the filename
 123         relativePath = relativePath[0:relativePath.rfind("/")]
 124
 125         if len(branches) == 0:
 126             branches.add(relativePath)
 127             continue
 128
 129         ###### this needs more testing :)
 130         knownBranch = False
 131         for branch in branches:
 132             if relativePath == branch:
 133                 knownBranch = True
 134                 break
 135             if relativePath.startswith(branch):
 136                 knownBranch = True
 137                 break
 138             if branch.startswith(relativePath):
 139                 branches.remove(branch)
 140                 break
 141
 142         if not knownBranch:
 143             branches.add(relativePath)
 144
 145     return branches
 146
 147 def commit(details, files, branch, prefix):
 148     global initialParent
 149     global users
 150     global lastChange
 151
 152     epoch = details["time"]
 153     author = details["user"]
 154
 155     gitStream.write("commit %s\n" % branch)
 156     committer = ""
 157     if author in users:
 158         committer = "%s %s %s" % (users[author], epoch, tz)
 159     else:
 160         committer = "%s <a@b> %s %s" % (author, epoch, tz)
 161
 162     gitStream.write("committer %s\n" % committer)
 163
 164     gitStream.write("data <<EOT\n")
 165     gitStream.write(details["desc"])
 166     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
 167     gitStream.write("EOT\n\n")
 168
 169     if len(initialParent) > 0:
 170         gitStream.write("from %s\n" % initialParent)
 171         initialParent = ""
 172
 173     for file in files:
 174         path = file["path"]
 175         rev = file["rev"]
 176         depotPath = path + "#" + rev
 177         relPath = path[len(prefix):]
 178         action = file["action"]
 179
 180         if action == "delete":
 181             gitStream.write("D %s\n" % relPath)
 182         else:
 183             mode = 644
 184             if file["type"].startswith("x"):
 185                 mode = 755
 186
 187             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 188
 189             gitStream.write("M %s inline %s\n" % (mode, relPath))
 190             gitStream.write("data %s\n" % len(data))
 191             gitStream.write(data)
 192             gitStream.write("\n")
 193
 194     gitStream.write("\n")
 195
 196     lastChange = details["change"]
 197
 198 def getUserMap():
 199     users = {}
 200
 201     for output in p4CmdList("users"):
 202         if not output.has_key("User"):
 203             continue
 204         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 205     return users
 206
 207 users = getUserMap()
 208
 209 if len(changeRange) == 0:
 210     try:
 211         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 212         output = sout.read()
 213         if output.endswith("\n"):
 214             output = output[:-1]
 215         tagIdx = output.index(" tags/p4/")
 216         caretIdx = output.find("^")
 217         endPos = len(output)
 218         if caretIdx != -1:
 219             endPos = caretIdx
 220         rev = int(output[tagIdx + 9 : endPos]) + 1
 221         changeRange = "@%s,#head" % rev
 222         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 223         initialTag = "p4/%s" % (int(rev) - 1)
 224     except:
 225         pass
 226
 227 sys.stderr.write("\n")
 228
 229 tz = - time.timezone / 36
 230 tzsign = ("%s" % tz)[0]
 231 if tzsign != '+' and tzsign != '-':
 232     tz = "+" + ("%s" % tz)
 233
 234 gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 235
 236 if len(revision) > 0:
 237     print "Doing initial import of %s from revision %s" % (prefix, revision)
 238
 239     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 240     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 241     details["change"] = revision
 242     newestRevision = 0
 243
 244     fileCnt = 0
 245     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 246         change = int(info["change"])
 247         if change > newestRevision:
 248             newestRevision = change
 249
 250         if info["action"] == "delete":
 251             continue
 252
 253         for prop in [ "depotFile", "rev", "action", "type" ]:
 254             details["%s%s" % (prop, fileCnt)] = info[prop]
 255
 256         fileCnt = fileCnt + 1
 257
 258     details["change"] = newestRevision
 259
 260     try:
 261         commit(details, extractFilesFromCommit(details), branch, prefix)
 262     except:
 263         print gitError.read()
 264
 265 else:
 266     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 267
 268     changes = []
 269     for line in output:
 270         changeNum = line.split(" ")[1]
 271         changes.append(changeNum)
 272
 273     changes.reverse()
 274
 275     if len(changes) == 0:
 276         print "no changes to import!"
 277         sys.exit(1)
 278
 279     cnt = 1
 280     for change in changes:
 281         description = p4Cmd("describe %s" % change)
 282
 283         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 284         sys.stdout.flush()
 285         cnt = cnt + 1
 286
 287         try:
 288             files = extractFilesFromCommit(description)
 289             if detectBranches:
 290                 for branch in branchesForCommit(files):
 291                     branchPrefix = prefix + branch + "/"
 292                     branch = "refs/heads/" + branch
 293                     commit(description, files, branch, branchPrefix)
 294             else:
 295                 commit(description, files, branch, prefix)
 296         except:
 297             print gitError.read()
 298             sys.exit(1)
 299
 300 print ""
 301
 302 gitStream.write("reset refs/tags/p4/%s\n" % lastChange)
 303 gitStream.write("from %s\n\n" % branch);
 304
 305
 306 gitStream.close()
 307 gitOutput.close()
 308 gitError.close()
 309
 310 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 311 if len(initialTag) > 0:
 312     os.popen("git tag -d %s" % initialTag).read()
 313
 314 sys.exit(0)